Smoothly deformable spheres: modeling, deformation, and interaction. - Daniel Schmitter; Pablo García-Amorena; Michael Unser (SIGGRAPH Asia Technical Briefs, 2016)

Compactly-supported smooth interpolators for shape modeling with varying resolution. - Daniel Schmitter; Julien Fageot; Anais Badoual; Pablo García-Amorena; Michael Unser (Graph. Model., 2017)

Smooth shapes with spherical topology: Beyond traditional modeling, efficient deformation, and interaction. - Daniel Schmitter; Pablo García-Amorena; Michael Unser (Comput. Vis. Media, 2017)